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Thread: Eyepieces

  1. #1
    Starlord's Avatar
    Starlord Guest

    Default Eyepieces



    I figure about Nov.06 I might be in the clear enough to look at buying an
    eyepiece or two to replace ones which over time have become almost
    un-useable due to scritchs,etc.

    So I was looking at Orion's catalog and figure maybe some of the ones they
    have in there, if anyone has used them, they could say what they are like.

    1. Orion Deepview 2 inch

    2. Orion "Epic" ED-2 EP's

    3. Orion Highlight Plossl

    4. Orion Expanse Wide-field

    Any info about them would be good.


    --
    The Lone Sidewalk Astronomer of Rosamond

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  2. #2
    WA2GUF@optonline.net's Avatar
    WA2GUF@optonline.net Guest

    Default Eyepieces


    Starlord wrote:

    I got a set of the expanse wide-field eyepieces and am pleased with
    their performance. The eye relief of all of the eyepieces in the set
    are pretty much the same, even the really short focal length ones. It
    looks like the short focal length eyepieces in the set are basically
    the same optics as the long focal length ones, but they have a negative
    element like a Barlow lens permanently mounted in front of them.
    Clif Ashcraft


  3. #3
    Martin R. Howell's Avatar
    Martin R. Howell Guest

    Default Eyepieces

    On Mon, 14 Aug 2006 16:19:53 -0700, Starlord wrote:



    I have the 9mm and the 6mm. The 6mm is fine for deep sky objects which
    will not produce the flared image that brighter objects will in this
    eyepiece. First light for me with the eyepiece was M31 through my 12.5
    inch dobsonian and words fail at describing how impressed I was.

    The 9mm is my favorite eyepiece. It gets much more use than any other.
    Nice flat image nearly to the extreme edge of the field and sharp star
    images. This is the eyepiece I would keep if I had to toss all but one.

    --
    Martin R. Howell

    "The Astro Lines"
    http://theastropost.wordpress.com

    --
    Posted via a free Usenet account from http://www.teranews.com


  4. #4
    Starlord's Avatar
    Starlord Guest

    Default Eyepieces

    That's for the info, I was thinking along the terms of maybe one of them for
    use with the full moon while doing my sidewalk astronomy. As it is now, I
    use my meade 25mm for that alone.


    --
    The Lone Sidewalk Astronomer of Rosamond

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    <WA2GUF@optonline.net> wrote in message
    news:1155599738.166711.245090@75g2000cwc.googlegro ups.com...



  5. #5
    Starlord's Avatar
    Starlord Guest

    Default Eyepieces

    I'm printing out any replys I get so I can keep them on hand for when I'm
    ready.


    --
    The Lone Sidewalk Astronomer of Rosamond

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    http://home.inreach.com/starlord
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    "Martin R. Howell" <martinhowell@ilikestarsisp.com> wrote in message
    news:1amwi0sv9ilc2$.1i6xa5iy6o0l6.dlg@40tude.net.. .



  6. #6
    Bill's Avatar
    Bill Guest

    Default Eyepieces

    Starlord wrote:
    .....
    I have the set of Orion Expanse eyepieces. I use them in my homemade
    8" f/6 dob. They're great as far as providing a wide field with plenty
    of eye relief. My only complaint is that I notice a bit of ghosting
    whenever I use the 9mm or 6mm on planets. This might be an issue for
    you as I know that planets are a common target when doing sidewalk
    astronomy. FWIW.

    Thanks,
    Bill B.


  7. #7
    Don't Be Evil's Avatar
    Don't Be Evil Guest

    Default Eyepieces


    Starlord wrote:

    I've heard the Expanse and ED-2 lines throw up a lot of internal
    reflections on the moon and planets. The Highlight plossl's are good
    in longer focal lengths. However, the Celestron Omni's are just as
    good, cheaper, and have better eye relief in middle focal lengths.
    Outstanding value.

    I don't know anything about the Deepview, but I used to use a 40mm 2"
    Celestron E-lux. I got mine for $40 and was satisfied.

    The eyepiece I really love for planets and the moon is the 5mm Stratus.
    More expensive than the ones you listed, but really out of their
    league. You can sometimes get them for $85-90 on astromart. Not quite
    a Panoptic, but pretty close. They're really clones of the Vixen LVW.
    They are big and heavy, if you have a tipsy dob.

    Greg


  8. #8
    Willie R. Meghar's Avatar
    Willie R. Meghar Guest

    Default Eyepieces

    "Starlord" <starlord@sidewalkastronomy.info> wrote:


    Hi Starlord,

    I lack experience with #1 and #2 above.

    I've been *very* pleased with the Highlight Plossls (7.5mm through
    26mm) for my own observing; but for sidewalk astronomy you'll probably
    want to stay away from those shorter than 17mm due to short eye
    relief. The eye relief gets shorter as the focal length gets shorter.
    The 17mm Plossl's eye relief is probably at or near the limit for your
    purposes.

    The eye relief (and wider field) of the Expanse line is well suited
    IMO for sidewalk astronomy. The sharpness of the field edge can drop
    off quite noticeably, particularly in the longer focal lengths. This
    may be more noticeable in shorter focal length telescopes. The 9mm
    and 6mm tend to be the better eyepieces in this line; but for your
    purposes any of the Expanses would probably do well.

    Willie R. Meghar

  9. #9
    Starlord's Avatar
    Starlord Guest

    Default Eyepieces

    Thanks for you and Bills replay, the one thing I forgot to say was that
    they'll be used mostly on one of two scopes, to start out with my 10inch f5
    dob and then once the repairs are done, my 8inch f8 dob.

    This weekend I got better views of Jupiter with my no brand name 10mm Ep
    than I've been getting with my 17mm tel-vue or my 25mm meade.


    --
    The Lone Sidewalk Astronomer of Rosamond

    Telescope Buyers FAQ
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    "Willie R. Meghar" <NoMail@thisaddress.net> wrote in message
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  10. #10
    MitchAlsup@aol.com's Avatar
    MitchAlsup@aol.com Guest

    Default Eyepieces


    Starlord wrote:

    I have some 20 year old eyepieces that remain perfect, and one with the
    tiniest of abrasion of the coatings. You need to start taking better
    care of your EPs.


 

 
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